| Expected volatility, share options granted | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Luaineacht ionchasach, scair‑roghanna deonaithe | ga | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Luaineacht ionchasach an phraghais scaireanna a úsáidtear chun luach cóir na scair‑roghanna deonaithe a ríomh. Is éard is luaineacht ionchasach ann tomhas an mhéid a bhfuil coinne le praghas luainiú le linn tréimhse. Is éard is tomhas na luaineachta a úsáidtear i samhlacha praghsála i leith conradh céadrogha ann diallas caighdeánach bliantúlaithe na rátaí toraidh arna gcomhshuíomh go leanúnach i leith na scaire i gcaitheamh tréimhse. | ga | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |